When you buy a more expensive wine, the waiter smiles approvingly. You savor the smell and get to call it a bouquet. When you buy a higher quality fabric for your bespoke suit, the tailor nods appreciatively because the fabric is a joy to work with and he knows you’ll revel in it. In contrast, if there’s a misunderstanding between you and your developers, it will cost you more but that’s not a fun way for them to make money.
Of course, this is a constant theme of mine. By getting organized and doing all you can to get all of your assumptions out of your head and onto “paper,” you’ll not only save money but you’ll keep your developers happy.